The Transactions of The Korean Institute of Electrical Engineers (전기학회논문지)

The Korean Institute of Electrical Engineers (대한전기학회)
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Suitability Evaluation on Joint Operation of Neutral Wire and Overhead Grounding Wire through Lightning Surge Analysis in Combined Distribution System

혼합배전계통에서 뇌과전압 해석을 통한 중성선과 가공지선 혼용 운전의 타당성 평가

  • 정석산 (원광대 대학원 전기공학과) ;
  • 이종범 (원광대 공대 전기정보통신공학부) ;
  • 김용갑 (원광대 공대 전기정보통신공학부) ;
  • 송일근 (전력연구원 송배전 연구소) ;
  • 김병숙 (한국전력공사)
  • Received : 2010.07.08
  • Accepted : 2010.11.03
  • Published : 2010.12.01
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Abstract

This paper studies the validity about a joint operation of neutral wire and overhead grounding wire in combined distribution systems. The overhead grounding wire and neutral wire are currently installed separately and grounded by common. However there is no any ineffectiveness or electrical problem in case of the proposed system, such system can be operated at real distribution system. Therefore this paper describes the suitability of a joint operation through lightning surge analysis on combined distribution systems. Lightning surge analysis is carried out by EMTP/ATPDraw to obtain the overvoltage of overhead line and underground cable in various conditions such as locations and current types of lightning stroke. Overvoltage gained by the analysis show that the insulation strength of the joint operation case is not stable compare with the current operation case.

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References

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